Manual Zero/Span Check With Izs Option; Automatic Zero/Span Check; Automatic Zero/Span Calibration - Teledyne 6200A Manual

TAI Model 6200A SO

7.3 Manual Zero/Span Check with IZS Option

The Internal Zero/Span (IZS) system can be operated from the front panel keyboard. When the
6200A is in the SAMPLE mode, and the IZS option is installed, the CALS (Calibrate-Span) or
CALZ (Calibrate-Zero) buttons will be visible. When the buttons are pressed, valves are
switched to allow zero air or SO
To do a manual zero check with the IZS Option, press CALZ, then wait about 10 minutes for the
zero reading to stabilize. The zero value in the display, and analog output is the zero value. Press
EXIT to return to SAMPLE mode. This procedure does not change the zero calibration of the
instrument.
To do a manual SO
stabilize. The concentration value in the display, and analog output is the span value. Press EXIT
to return to SAMPLE mode. This procedure does not change the span calibration of the
instrument.

7.4 Automatic Zero/Span Check

In a typical air monitoring application it is desirable to have the analyzer automatically check
(AUTOCAL) its calibration each day. If provided with the proper options, the 6200A provides
this capability by using the time of day clock to signal the computer system to check operations.
When enabled, the instrument software will automatically check zero and span (AUTOCAL) on
a timed basis. Optionally, the Z/S cycle can be moved backwards or forwards a fixed time each
day(to avoid missing measurements at the same time each day).
Setup of the AUTOCAL is covered in Section 6.4.

7.5 Automatic Zero/Span Calibration

The AUTOCAL system described above can also optionally be used to calibrate the instrument
on a timed basis. The automatic calibration is enabled by setting CALIBRATE button to ON
under each SEQUENCE setup (Refer to Section 6.4).
Before proceeding with enabling Automatic Z/S you must setup the AUTOCAL feature.
Enabling this feature is described in Section 6.4.
With automatic calibration turned on, the instrument will re-set the slope and offset values for
the SO concentration. This continual re-adjustment of calibration parameters can often mask
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subtle fault conditions in the analyzer. It is recommended that if Automatic Calibration is
enabled, the TEST functions, and SLOPE and OFFSET values in the 6200A are checked
frequently to assure high quality and accurate data from the instrument.
Analyzer Operator Manual, 02164, Rev. G
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span gas to be input into the instrument.
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span check, press CALS, then wait about 10 minutes for the SO
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7-7
reading to
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